Pressure-regulator.



No. 050.725. Patented May 20, |900. J. P. METZGER.

PRESSURE REGULATOR.

(Application led Mar. 21, 1900.) (N0 Model.) 2 sheetsshet 2.

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JULES P. METZGER, OF NEW YORK, N. Y., ASSIGNOR TO JOHN S. LESLIE, OFPATERSON, NEW JERSEY.

PRESSUEE-RGULATOE.

SPCFICATION forming part of Letters Patent o. 650,725, dated lliay Q9,1960. Application iiled March 21, 1900. Serial No. 9,543. (No model.)

.To @ZZ whom it may concern,.-

Beit known that I, JULES P. METZGER, of the borough of Manhattan, in thecity and State of New York, have invented a certain new and usefulImprovement in Pressure- Regulators, of which improvement the followingis a specification. l

My invention relates to pressure-regulating appliances of the generalclass whichvare exemplified in an application for Letters Patent of theUnited States filed by me November 24, 1899, Serial No. 738,125, (OaseA,) and is an improvement upon certain features of thepressure-regulators set forth in my application, Serial No. 741,811,filed December 28,'

1899, (Oase 0,) and in my application, Serial No.9,542,led of even dateherewith, (Case D.)

In my two last aforesaid applications for the purpose of enabling areduction to be made in the diameter of the valve-actuating piston andits chamber or cylinder-a consideration which is of substantialimportance in all pressure-regulating appliances of the type to whichthose of said applications relate-I have illustrated the main orregulating valve as of the balanced double-beat puppet type.

The object of my present invention is to attain the same advantage as toreduction of the size of the piston and its chamber, while obviating thenecessity for employing a double-beat valve, which necessitates acomparatively-large valve-casing.

The improvement claimed is hereinafter` fully set forth. l I

In the accompanying drawings, Figure 1 is a longitudinal central sectionthrough a presto explain the relation thereto of my present invention.

l Referring first to the construction shown in Fig. l, the valve casingor shell 1 has an inlet-passage 2 at one end and an outlet-passage 3 atthe other, each being provided with a screw-thread, for which a iiangemay be substituted in larger-sized regulators,for connection with afluid-pressure pipe. and outlet passages ,are separated by a wall orpartition 5, 'extending across the casing and having an opening orpassage 6, controlled by a main or regulating valve 7, which isconnected, preferably by screw-threads, as shown, to a stem 3 and seatsupon a face on the lower side (being that next the inletpassage) of thepartition 5. The opening movements of the regulating-valve 7 areeffected by a properly-packed piston 13, which is actuated by fluidunder pressure from the inlet side of the casin g, as presently to be'described, and is fitted to traverse in a piston chamber or cylinder14,formed upon or prefer- The inlet ably, as shown, connected removablyto the valve-casing 1 below and in line axially with theregulating-valve 7. The piston 13 is fixed upon the valve-stem 8,preferably, as shown,by being held thereon betweenashoulder or collaranda nut Sd,engagin g a screw-thread on the end of the stem. In theinstance shown,which is desirably applicable in practice,thepistonchamber 14, which is open at each end, is iitted in an opening inthe casing l of sufficient size to admit of the insertion, removal, orinspection of the regulating-valve 7. The outer end of thepiston-chamber is closed and the chamber firmly secured to the casing 1by a removable head or cap 10, connected to the casing by bolts 11. Theregulating-valve is subject to the pressure of a spring 12, which bearsagainst the lower side of the piston 13 and against the cap 10 and actsin conjunction with the inlet-pressure to seat the valve.

The upper portion of the casing l is provided with a projecting portion,which receives a controlling-valve to be presently described and whichis recessed at top to form a pressure-chamber 25, which communicates by'a port 43 with the outlet side of the casing and is closed at top by aflexible diaphragm 2G, which is fitted in a central opening in theprojecting portion of the casing and is secured peripherally between theface around Tsaid opening and ay diaphragm-holder 27,eonnectedremovably, as yby screw-threads, tothe casing. The diaphragm-holder andits accessories are substantially similar in all essential particularsto those of f my applieations aforesaid, and as it does not in and of-itselfforin part of my present invention it need not be herein atlength described fur# ther than to note that it ineloses a lowerspring-seat 30, which is pressed against the upper face of the diaphragm2G by yar diaphragm-spring29.

A central passage Gl? is formed in the regulating-valve 7 and iscontrolled by an auxiliary or starting valve 7, formed upon or fixed toa stem 7 S and normally kheld seated ony the lower or inlet side of thepassage Gl by a spring 711 l lhestem 8 of the regulating-valve isenlarged at and near its connection with said yValve and is providedwith an internal chamber,which is in constant communication rwith theinlet-passage 2 of the easing th rough the casing 1. f

The exhaust and admission of fluid under pressure from and to theypiston-chamber 14 on the lower side of the piston 13 for the purposeofinstitutingthe opening and closing movements, respectively, of theregulatingvalve 7 and the opening movements of the auxiliary or startingvalve 7d are effected and regulated by a secondary or controlling valve34, formed upon or xed to a stem 35 and adapted to move vertically in asocket formed in the projecting upper portion of the casing l in lineaxially with the diaphragm-spring 29 and with the regulatin g-valve stemS. The lower end of the controlling-valve stem 35 lits truly in andbears against the bottom of a socket formed in the upper end portion ofthe stem 7 g of the auxiliary or starting valve. The controlling valve34 is of cylindrical form and is provided withaperipheral groove adaptedto establish communication between a port 40, leading from theinlet-passage 2 of the casing to the socket of the controllingvalve, anda port 41, leading from said socket to a communication with thepiston-chamber 14 on the lower side of the piston 13. A lateral recess34, formed in the controllingvalve, establishes communication in anotherposition of said valve between the port 41 and a port 43, leading fromthe socket of the controlling-valve to the port 43, which, as beforestated, leads to the outlet-passage 3 of the casing. The stein of thecontrolling-valve is controlling valve is fitted.A

leads downwardly from the eontrolling-val-ve held to a bearing en theinner side of the flexible diaphragm y26 bya spring 37, abutting againsta collar on the stem and against a face at the end of the socket inwhich the The port 41 socket to an annular groove or recess 41, formedin the 'casing 1, surrounding a flange on the piston-chamber, which litsin a recess or counterbore in the easing, and ports 41" rlead from therecess 4l to the piston-cham ber on the lower side of the piston 13.

When in readiness for operation, the parts f being inthe positions shownin Fig. 1, Huid under pressure admitted to the inlet-passage 2 passesthrough the ports 40 and 4l, recess 41, and ports 41" to thepiston-chamber 14,

and the regulating-valve will be held seated by the pressure on theexcess of its area above that of the piston and by the spring l2. -Uponf the depression of the .li'exible diaphragm 2G and controlling-valve 34by screwing down to the adjusting device,fso as to impose the dew sireddegree of pressure on the diaphragm, the controlling-valve will cut oitcommunicaf tion between the supply-port 40 and the port 4l andpiston-chamber 14, and the port 41 will f beput into communication withthe ports 43 and 43 by the recess 341 ot" the controllingvalve. Fluidwill therebybe exhausted from' the piston-chamber to the outlet-passageof the casing, and fluid from the inlet-passage 2 will acty upon theupper side of the piston without opposition from fluid-pressure on thelower side. The auxiliary or starting valve 7 l will be coincidentlyunseatedby the downward movement of the controlling-valve, and yil uidunder pressure will pass from the inletpassage 2 to the outlet-passagethrough the openings 7c and Gb in the regulating-valve 7. Theregulating-valve being now subject to pressure on both sides, it will beunseated by.

the unbalanced pressure, which acts on the upper side of the piston 13andimparts downward movement thereto, and the auxiliary or startingvalve will be carried downward with the regulating valve. Thecontrolling members thereupon operate to eiiect the desired regulationof pressure substantiallyin the same manner as those of myseveralapplications aforesaid, except that if there should be a sudden demandfora large quantity of fluid and the regulating-valve should partiallyclose the auxiliary Valve would remain unseated and the flow of iluidthrough the passage 6" would again more nearly balance it and cause itto again open more fully and alord the desired supply. Theauxiliary-valve stem being guided at both its upper and lower ends andthe regulatingvalve stem being guided by the piston and its chamber, thetrue axial movement of regulating-valve is insured under all conditionsot' service.

The modification shown in Fig. 2 accords in all substantial structuraland operative ICO IZO

features with that first described and differs therefrom only as to thelocation ofthe piston-chamber and the disposition of the ports connectedtherewith. In this instance the piston-chamber 14 is formed in a top cap21, secured removably, as by screw-threads, to

the casing 1 on the upper side of the regulat-V ing-valve 7. An annularrecess 43 is formed in the face of the top cap,which abuts against thecasing, so as to maintain continuous communication between the portionof the port 43 leading to the pressure-chamber 25, which is located inthe top cap, and the portion which is formed in the casing, regardlessof the position which may be assumed by the top cap when screwed down toits adjusted relation to the casing. ton-chamber 14 is closed by aremovable head 20, between which and the piston 13 isinterposed theclosing-spring 12 of the regulating- Valve 7. rlhe controlling-valve 34is in this instance of the puppet type and is fitted to seat upwardly ona face on the lower side of the head 2O and controls a port 411, leadingfrom the piston-chamber 14 to the pressurechamber 25. Fluid underpressure is adinitted from the inlet-passage 2 to the pistonchamber 14on the lower side of the piston through a port 40, which is'shown asformed bya loose tit of the controlling-valve stem 8, to the upper endof which the piston is secured in the Wall of the casing which separatesthe piston-chamber from the inlet-passage 2A. It will, however, beobvious that, if desired, the lower end of the piston-chamber might beleft entirely open, in which case the open end would perform thefunction and constitute a mechanical equivalent of the port 40.(Indicated on the drawings.) The piston 13 could also in such case beformed integral with the regulating-valve stem. A restricted port 40a,formed in the piston 13, permits a limited traverse of Huid from thelower to the upper side thereof.

In the operation of the construction of Fig. 2 fluid from theinlet-passage 2 fills the piston-chamber comparatively slowly throughthe restricted port, and upon screwing down the adj usting-cap 32 totheproper degree the fluid is exhausted from the piston-chamber to theoutlet-passage 3 through the ports 41 and 43 by the unseating of thecontrollingvalve 34. The downward movement of the controlling valvesimultaneously unseats the auxiliary or starting valve 7d, as in theinstance first described, and fluid passes from the inlet-passage. 2 tothe outlet-passage 3 through the openings 6b and 7e. As the inflow offluid to the lower side of the piston 13 through the port 40 or throughthe open lower end of the piston-chamber, as the casemay be, is so muchmore rapid than the passage of uid through the restricted port 40;L inthe piston the pressure below the piston raises the piston and unseatsthe connected regulating-valve 7, when said valve is exposed to pressureon its opposite sides by the unseat- The top of the pis-A ing of theauxiliary or starting valve, as in the former instance.

It will be obvious that various structural modications of the membersherein described may be made by those skilled in the art withoutdeparture from the essential features and operative principle of myinvention, particularly as to the details of connection of the pistonand valve chambers and the valve-casing, the regulating valve and stem,and the form and location of the ports. I do not therefore limit myinvention to the specific embodiments thereof which are herein shown anddescribed.

I claim as my invention and desire to secure by Letters Patent- 1. In apressure-regulator, the combination of a valve shell or casing havinginlet and outlet passages separated by a partition, a main or regulatingvalve controlling a passage in said partition, a piston-chamber on thecasing, a piston iitting in said chamber and adapted to impart movementto the regulating-valve, a iiexible diaphragm subject to pressure fromthe outlet-passage, a pressure device bearing on said diaphragm ,andmeans,actu ated by the movement of said diaphragm, for facilitating theunseating of the regulating-valve by establishi ng communication throughsaid valve, while seated, between the inlet and the outlet passages ofthe casing.

2. In apressure-regulator, the combination of a valve shell or casinghaving inlet and outlet passages separated by a partition, a main orregulating valve controlling a passage in said partition, apiston-chamber on the casing, a piston fitting in said chamber andadapted to impart movement to the regulating-valve, aflexible diaphragmsubject to pressure from the outlet-passage, a pressure device bearingon said diaphragm, and means, actuated by the movement of saiddiaphragm, for exhaustin g pressure from one side of the piston andcoincidently establishing communication through the regulating-valve,while seated, between the inlet and outlet passages of the casing.

3. In a pressure-regulator, the combination of a valve shell or casinghaving inlet and outlet passages separated by a partition, a main orregulating valve controlling a passage in said partition,apiston-chamber on the casing, a piston fitting in said chamber andadapted to impart movement to the regulating-valve, a flexible diaphragmsubject to pressure from the outlet-passage, a pressure device bearingon saiddiaphragm, an auxiliary or starting valve controlling a passagethrough the regulating-valve, a controlling-valve actuated by movementof the flexible diaphragm and governing the supply and exhaust of fluidto and from the piston, and intermediate connections through whichopening movement is imparted to the auxiliary valve in and by movementof the controlling-valve.

4. In a pressure-regulator, the combination of a valve shell or casinghaving inlet and out- IOO IIO

let passages separated by a partition, a main or regulating valvecontrolling a passage in said partition,a piston-chamber on the casing,a piston fitting in said chamber and adapted to impart movement to theregulating-valve, aflexible diaphragm subject to pressure from theoutlet-passage, a pressure device bearing on said diaphragm, anauxiliary or starting valve controlling a passage through the regulating-Valve, ports for the supply and exhaust of fluid to and from thepiston-chamber, and a controlling-valve actuated by movement of theflexible diaphragm to coincidently open ports for the exhaust ot' fluidfrom the pistonchamber and unseat the auxiliary or starting valve.

5. In a pressure-regulator, the combination of aval ve shell or casinghaving inlet and outlet passages separated by a partition, a main orregulating valve controlling a passage in said partition, apiston-chamber on the casing, a piston fitting in said chamber, saidpiston being constantly subject, on one side, to pressure from theinlet-passage of the casing and intermittently subject, on its oppositeside, to said pressure, a stem connecting the piston andregulating-valve, a flexible diaphragm subject to pressure from theoutlet-passage, a pressure device bearing on said diaphragm, and acontrolling-valve,actuated by the movement of said diaphragm andgoverning ports l through which pressure is exhausted from one side ofthe piston.

G. In a pressure-regulator, the combination of a valve shell or casinghaving inlet and outlet passages separated by a partition, a main orregulating valve controlling a passage in said partition,apiston-ehamberon the casing, in line axially with the regulating-valve, a pistonfitting in said chamber, a stem connecting the piston andregulating-valve, afleXible diaphragm fixed in a pressure-chamber on theside of the easing opposite to the pistonchaniber and subject topressure from the outlet-passage, a pressure device bearing on saiddiaphrag1n,an auxiliary orstarting valve controlling a 'passage throughthe regulatingvalve, ports for the supply and exhaust of fluid to andfrom the piston-chamber, a controlling-valve bearing on and actuated bymovements ofthe flexible diaphragm,and governing said supply and exhaustports, a stem fixed to the auxiliary or starting valve and bearing onthe controlling valve, a lower guide for said stem in the stem of thepiston and regulating-valve, and an upper guide for said stem in thevalve shell or easing.

JULES I. METZGER.

Witnesses:

A. LOEFFLER, HENRY VVHITEHOUSE.

